Belt buckle



FIG. 1 is a front elevational view of a belt buckle showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof, the undisclosed bottom plan elevational view is a mirror image of the side shown; and

FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image of the side shown. 

The ornamental design for belt buckle, as shown and described. 